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Science 8th. grade Earth's Cycles Review
Terms in this set (29)
motion of one object around another object.
Autumnal Equinox (September)
Autumn begins in northern hemisphere . Spring begins in southern hemisphere. 12 hr. day, 12 hr. night.
Vernal Equinox (March)
Spring begins in northern hemisphere. Fall in March 20/21 southern hemisphere . 12 hr. day, 12 hr. night.
Summer solstice (June 20/21)
Days in northern hemisphere longer days in southern hemisphere are shorter. North begins summer/south winter.
Winter solstice (December 21/22)
Northern Hemisphere shorter days. Southern longer days. North =winter. South=summer.
More of the moon's near side is lit each night. (Light is on the right)
less of the moon's near side is lit each night. (light on the left)
when the moon appears completely lit up.
When the moon's near side is completely dark
Less than 1/2 of moon is lit
more than 1/2 of moon is lit
Half of the moon is lit. (Right=1st. Quarter) (Left= 3rd. Quarter
During a Full Moon and New Moon, phases produces higher and lower tides due to combine gravitation a pull of moon and sun.
High and low tides are less drastic. Sun, Earth, Moon form a 90` (1st. and 3rd. Quarter moons)
Describe the position of the Earth compared to the Sun during the summer in the Northern Hemisphere.
The tilt of the Earth on its axis has the Northern Hemisphere turned towards the sun causing it to get more direct light.
Explain how seasons compare in the Northern Hemisphere with those in the Southern Hemisphere.
Seasons in the Northern Hemisphere are opposite of those in the Southern Hemisphere.
What do you think would happen if the Earth were not tilted on its axis? What would this effect?
There would not be a change in direct light from the sun, so seasons would not occur. The region you live in would stay the same all year.
Explain how day length is related to seasons.
The more direct light, the longer hours of daylight.This means in the months of more direct light longer days/summer. Less light=winter
In what direction does the moon revolve around the Earth?
On what side is a waxing moon lit?
On what side is a warning moon lit?
What are the position of the Earth, Sun, and Moon during a new moon phase?
Moon is between the Sun and Earth.
In what phases is the Moon during a spring tide?
New Moon and Full Moon.
In what phases is the Moon during a neap tide?
First Quarter and Third Quarter
What causes tides?
Gravitational pull from the moon.
What is the differences between a spring tide and a neap tide?
spring tide has a more dramatic effect on tides due to the combine gravitational pull of Sun and Moon Neap tide has less effect due to gravitational pulls not being done in same directions.
How often does the Earth have high tides? Low tides?
2 high tides a day and 2 low tides a day.
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